Internal Server Error when using Form Designer

PHP 5.5.35
Joomla! 3.4.8
Chronoforms 5.0.11

I'm working on a rather long form that will ultimately have about 80 fields. I got to the 25th field and now each time I try adding a new field I get a generic Internal Server Error. Not sure if the error has anything to do with the form itself, but I had no issues until now. Any suggestion on how to troubleshoot? I don't seem to be having issues anywhere else in my Joomla admin.

Update: The problem is not related to the form designer as I'm getting the error any time I try saving the form while editing the code directly.

Hi hobartimus,

Please see this FAQ - you probably want the second FAQ linked to from paragraph 2.

Bob

Thanks. I followed those directions and increased the recommended limits to 3000 and still getting an error.

Hi hobartimus,

Please check the System Info > PHP Info tab to check that the setting has actually changed.

Please try a higher setting?

Do you see any error messages in the server log that give a clue?

Bob

Yes, I have verified that all of these are set to 3000…
max_input_vars
suhosin.get.max_vars
suhosin.post.max_vars
suhosin.request.max_vars

This is the full error message…

Internal Server Error

The server encountered an internal error or misconfiguration and was unable to complete your request.

Please contact the server administrator at webmaster@sandbox.catchlight.com to inform them of the time this error occurred, and the actions you performed just before this error.

More information about this error may be available in the server error log.

Additionally, a 500 Internal Server Error error was encountered while trying to use an ErrorDocument to handle the request.

Hi hobartimus,

You can try a higher setting, and/or have a look for clues in the server logs to see if there is some other problem.

Bob

OK.

Thanks,
Howard