Hi,
1) Fix website error above: will check template + database. Do you have backup site? some cases need get original files.
2) Create a copy of the same website (one color change) and upload it to my other domain name: OK
3) Create a CAPTCHA code in my contact forms so i stop getting so much spam: OK
4) Clean up disk space on my server: OK (check folder caches,tmp,log, images )
Time 3 days
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Regards