SP8

Hi anybody, I have just very low knowledge of processwire. I used it to update my projects and data. That’s it. Always did this on my mobile phone. But now I don’t have access to it anymore. I try to login on process wire as usually. But instead of opening the program, this message occurs: Unable to complete this request due to an error. Error has been logged. Could someone please help me. My former administrator doesn’t use processwire anymore. Thanks for your help! Steve