Seems like Bitdefender all of a sudden is blocking access to TImeslip's servers.
If you think the website/ file is incorrectly blocked by bitdefender you can share the same with malware researchers by filling up the forum in below stated link
If website/ file is indeed incorrectly blocked, detection will be removed in maximum of 72 hours and if the detection still remains after 72 hours, considered the website/ file as malicious by malware researchers and the detection will stay.
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Bitdefender Ultimate Security Plus (user)