Hello oficinamediaes,
Saving the form configuration works as expected everywhere else.
Visforms has no other problems saving the form configuration.
There is also no PHP error when saving the form configuration, which could indicate an existing problem in Visforms.
I suspect that the error is most likely related to the TinyMCE plugin (TMP).
TMP works intensively with the entered text.
TMP can be configured very extensively, for example, when editing and saving content.
I suspect that your problem is ultimately with TMP.
Since there are apparently no PHP errors, I suspect a JavaScript problem.
TMP primarily works with JavaScript in the web browser.
You could check the web browser's developer tools to see if there is a JavaScript error on the page.
The use of the web browser's developer tools is described in the documentation.
Use the developer tools:
docs.joomla-5.visforms.vi-solutions.de/e...-the-developer-tools
Kind Regards, Ingmar