2.20.25. ModSecurity error: Request body no files data length is larger than the configured limit
View error "ModSecurity: Request body no files data length is larger than the configured limit (1048576)" in Errorlog means that the amount of data sent in the POST request exceeds the set limit, which can be processed by the ModSecurity security module built into the hosting.
To resolve the error, open site settings and increase the parameter value "Maximum request size" (default is 1 MB). After that, wait a few minutes for the changes to take effect and try to reproduce the actions on the site that caused this error.