I have the same issue, any further progress?
The plugin was enabled but sideloadly still got the same error.
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Idle.
Local Anisette init fail: Sideloadly's Local Anisette Mail Plug-in was installed but seemingly not enabled. Please open Mail application's settings, press 'Manage Plug-Ins' button, enable Sideloadly Plug-in, and press Restart Mail.
Timed out
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Sideloadly version 0.26.3, Darwin 12.4, amd64
Using IPA file: /Users/chenyanting/Downloads/Instagram_242.0_und3fined.ipa: 1ea0c811a1330050d0eb159aa35cdf13
M1 requires mangling, will mangle bundle ID
Obtaining team ID
Got error: Login failed (-36607): Unable to sign you in to your Apple ID. Try again later.
Retrying with alt Anisette
ERROR: Guru Meditation 89ea16@132:84354a@89:84354a@234:f8880e@1049:f8880e@1044:f8880e@606:f8880e@536:f8880e@193:f8880e@190:94215d@88:39fdba Failed to obtain anisette: 504 Gateway Time-out
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