Hey Karelle,
Thanks for reaching out. We unfortunately do not offer tech support for the nonprofit licenses. To receive full support access, you must purchase a premium license.
This is clarified on this page about the program: https://theeventscalendar.com/knowledgebase/do-you-offer-discounts-for-nonprofit-organizations/
I will close this thread since we cannot provide support for nonprofit licenses; but in closing, I would like to mention that it may be worth contacting your web host about the issue you describe here, as it sounds like it could be something going wrong on the server level.
Sincerely,
George