BUG: 502 Bad Gateway when register and download data

[b-y-f]

• [x] I have checked that this issue has not already been reported.
• [x] I have confirmed this bug exists on the latest version of acnportal.

Describe the bug [A clear and concise description of what the bug is. Check out this blog post for some suggestions on writing bug reports.]

To Reproduce [Steps to reproduce this bug.]

Expected behavior [A clear and concise description of what you expected to happen.]

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System Info

• OS: [e.g. macOS 10.15.3]
• acnportal version [e.g. 1.0.3]
• dependency versions

Additional context [Add any other context about the problem here.]