diff --git a/docs/content/doc/usage/errors.md b/docs/content/doc/usage/errors.md
index 1ff2ea801..fc364ee7e 100644
--- a/docs/content/doc/usage/errors.md
+++ b/docs/content/doc/usage/errors.md
@@ -73,29 +73,30 @@ This document describes the different errors Vikunja can return.
 
 | ErrorCode | HTTP Status Code | Description                                                                |
 |-----------|------------------|----------------------------------------------------------------------------|
-| 4001 | 400 | The project task text cannot be empty.                                     |
-| 4002 | 404 | The project task does not exist.                                           |
-| 4003 | 403 | All bulk editing tasks must belong to the same project.                    |
-| 4004 | 403 | Need at least one task when bulk editing tasks.                            |
-| 4005 | 403 | The user does not have the right to see the task.                          |
-| 4006 | 403 | The user tried to set a parent task as the task itself.                    |
-| 4007 | 400 | The user tried to create a task relation with an invalid kind of relation. |
-| 4008 | 409 | The user tried to create a task relation which already exists.             |
-| 4009 | 404 | The task relation does not exist.                                          |
-| 4010 | 400 | Cannot relate a task with itself.                                          |
-| 4011 | 404 | The task attachment does not exist.                                        |
-| 4012 | 400 | The task attachment is too large.                                          |
-| 4013 | 400 | The task sort param is invalid.                                            |
-| 4014 | 400 | The task sort order is invalid.                                            |
-| 4015 | 404 | The task comment does not exist.                                           |
-| 4016 | 400 | Invalid task field.                                                        |
-| 4017 | 400 | Invalid task filter comparator.                                            |
-| 4018 | 400 | Invalid task filter concatinator.                                          |
-| 4019 | 400 | Invalid task filter value.                                                 |
-| 4020 | 400 | The provided attachment does not belong to that task.                      |
-| 4021 | 400 | This user is already assigned to that task.                                |
-| 4022 | 400 | The task has a relative reminder which does not specify relative to what.  |
-| 4023 | 409 | Tried to create a task relation which would create a cycle.                |
+| 4001      | 400 | The project task text cannot be empty.                                     |
+| 4002      | 404 | The project task does not exist.                                           |
+| 4003      | 403 | All bulk editing tasks must belong to the same project.                    |
+| 4004      | 403 | Need at least one task when bulk editing tasks.                            |
+| 4005      | 403 | The user does not have the right to see the task.                          |
+| 4006      | 403 | The user tried to set a parent task as the task itself.                    |
+| 4007      | 400 | The user tried to create a task relation with an invalid kind of relation. |
+| 4008      | 409 | The user tried to create a task relation which already exists.             |
+| 4009      | 404 | The task relation does not exist.                                          |
+| 4010      | 400 | Cannot relate a task with itself.                                          |
+| 4011      | 404 | The task attachment does not exist.                                        |
+| 4012      | 400 | The task attachment is too large.                                          |
+| 4013      | 400 | The task sort param is invalid.                                            |
+| 4014      | 400 | The task sort order is invalid.                                            |
+| 4015      | 404 | The task comment does not exist.                                           |
+| 4016      | 400 | Invalid task field.                                                        |
+| 4017      | 400 | Invalid task filter comparator.                                            |
+| 4018      | 400 | Invalid task filter concatinator.                                          |
+| 4019      | 400 | Invalid task filter value.                                                 |
+| 4020      | 400 | The provided attachment does not belong to that task.                      |
+| 4021      | 400 | This user is already assigned to that task.                                |
+| 4022      | 400 | The task has a relative reminder which does not specify relative to what.  |
+| 4023      | 409 | Tried to create a task relation which would create a cycle.                |
+| 4024      | 400 | The provided filter expression is invalid.                                 |
 
 ## Team
 
diff --git a/pkg/models/error.go b/pkg/models/error.go
index a3b78c445..84220540f 100644
--- a/pkg/models/error.go
+++ b/pkg/models/error.go
@@ -1021,7 +1021,7 @@ func (err ErrTaskRelationCycle) Error() string {
 }
 
 // ErrCodeTaskRelationCycle holds the unique world-error code of this error
-const ErrCodeTaskRelationCycle = 4022
+const ErrCodeTaskRelationCycle = 4023
 
 // HTTPError holds the http error description
 func (err ErrTaskRelationCycle) HTTPError() web.HTTPError {
@@ -1032,6 +1032,34 @@ func (err ErrTaskRelationCycle) HTTPError() web.HTTPError {
 	}
 }
 
+// ErrInvalidFilterExpression represents an error where the task filter expression was invalid
+type ErrInvalidFilterExpression struct {
+	Expression      string
+	ExpressionError error
+}
+
+// IsErrInvalidFilterExpression checks if an error is ErrInvalidFilterExpression.
+func IsErrInvalidFilterExpression(err error) bool {
+	_, ok := err.(ErrInvalidFilterExpression)
+	return ok
+}
+
+func (err ErrInvalidFilterExpression) Error() string {
+	return fmt.Sprintf("Task filter expression is invalid [ExpressionError: %v]", err.ExpressionError)
+}
+
+// ErrCodeInvalidFilterExpression holds the unique world-error code of this error
+const ErrCodeInvalidFilterExpression = 4024
+
+// HTTPError holds the http error description
+func (err ErrInvalidFilterExpression) HTTPError() web.HTTPError {
+	return web.HTTPError{
+		HTTPCode: http.StatusBadRequest,
+		Code:     ErrCodeInvalidFilterExpression,
+		Message:  fmt.Sprintf("The filter expression '%s' is invalid: %v", err.Expression, err.ExpressionError),
+	}
+}
+
 // ============
 // Team errors
 // ============
diff --git a/pkg/models/task_collection_filter.go b/pkg/models/task_collection_filter.go
index 32e12acf1..21e3f52e2 100644
--- a/pkg/models/task_collection_filter.go
+++ b/pkg/models/task_collection_filter.go
@@ -152,7 +152,10 @@ func getTaskFiltersByCollections(c *TaskCollection) (filters []*taskFilter, err
 
 	parsedFilter, err := fexpr.Parse(c.Filter)
 	if err != nil {
-		return nil, err
+		return nil, &ErrInvalidFilterExpression{
+			Expression:      c.Filter,
+			ExpressionError: err,
+		}
 	}
 
 	filters = make([]*taskFilter, 0, len(parsedFilter))