Something went wrong. Edits could not be saved

Error Message

Attempts to create new features or update feature edits in Map Viewer fail and return the following error message:

Error:
Something went wrong
Edits could not be saved: Error

Cause

• When creating new features, <Null> is specified in the attribute of the text field.
• In the feature's attribute table, <Null> is specified in the text field instead of the default null value. The image below shows <Null>, and the null value (blank space) in the attribute table.

Solution or Workaround

Exclude <Null> when creating new features

In Map Viewer, in the Create features pane, exclude '<Null>' from the attribute of the text field when creating features. Refer to ArcGIS Online: Edit features (Map Viewer) for more information.

Populate <Null> with null values using an Arcade expression

Note:
To apply this workaround, ensure the 'Keep track of changes to the data (add, update, delete features)', 'Keep track of who edited the data (editor name, date and time)' or 'Enable Sync (required for offline use and collaboration)' options are not checked under the Feature layer (hosted) section on the ArcGIS Online Settings tab.

1. In ArcGIS Online, open the hosted feature layer item details page.
2. Click the Data tab and select Table.

3. In the Table view, click the header of the field and select Calculate.

4. In the Calculate Field : <field name> window, click Arcade. The Arcade Calculator: <field name> window opens.

5. Copy the following Arcade expression and paste it in the Expression box. Replace <field_name> with the selected field name and click Test.

if ($feature.<field name> == "<Null>"){
Return None
}

else {
Return $feature.<field name>
}

6. When the Results tab displays the result, click OK.

The attribute table below shows <Null> replaced with the null value (blank space).