Invalid License File (ERROR CODE 500)

Good morning!

Today my license expired on my portal. I took renew file on the website and try to put it on my server. I received the error below:

“ERROR CODE : 500

Please contact

ZOHO Corporation

4900 Hopyard Road, Suite 310

Pleasanton, CA 94588 USA

Phone: +1-925-924-9500

Fax : +1-925-924-9600

I want to use the free version, more or less one year ago I bought the Project module but I don’t want it anymore.

Thanks in advance for your help.