If I click on a link on your website does it work or do potential clients get an error message?
If I fill out your form, does it actually work and does it either give me a “thank you” message or take me to a “thank you” page.?
Does your potential customer get an automated email letting them know you will be in touch?
Do you have strange looking symbols on your site where images used to be?
Is your phone number clickable on your mobile version?
I could go on and on asking you questions about your site.
You should immediately test everything on your website. A website with lots of errors offers a poor user experience and will not rank well in Google.