Dear Sir/Madam,

The only change has been the switch to PHP 8. I am still using Joomla 3.10.5 and RS Form 2.0.15.

On sending a completed form I am now getting this error: 0 - get_class_methods(): Argument #1 ($object_or_class) must be an object or a valid class name, string given

www.collegewebsites.ac.uk/about-us/contact-us

Yours faithfully,

Jed Keenan

I also have an error with PHP 8

0 Unsupported operand types: string + float

When submitting a completed form.

Also the messages below from the error reporting of Joomla

Joomla 3.10.6
RSForm Pro 3.0.15

I'm here because we are also having the same issue after moving to PHP 8.0

jed_keenan wrote:
I've tested your form and there's no such error, I assume that you've figured it out?

booija wrote:
What you're encountering is most likely related to the used PDF library, if I'm not wrong, you're probably using the old dompdf library which is too obsolete for Joomla! 4 (dompdf8 is being included within the RSForm!Pro PDF plugin by default and is also kept for legacy reasons).

You can try to include either 'dompdf v1.x library' or 'mPDF library' in order to use these instead to generate your PDF files as they are more reliable. Instructions on this topic can be found here. Once this is done navigate to backend > Components > RSForm!Pro > Configuration > PDF > set 'PDF Library' to either 'ompdf v1.x' or 'mPDF', save your settings, and then test this once more.