Fix Changing server plan msg on proxy

[ExtraSmartMiner]

Bug report

Checklist

• [x ] I have read and agree to the README (found on https://github.com/Minehut/Meta)
• [ x] I am NOT reporting a security vulnerability
• [x ] I have searched the Issue Tracker to make sure this is not a duplicate issue
• [ x] This issue does not contain any sensitive information

Platform

None

Describe the bug

To reproduce
Steps to reproduce the behaviour:

1. Get a proxy
2. link server to it on a daily plan
3. wait 1 day
4. See error/invalid msg

Expected behaviour
You should see an error that tells you what happened.

Device Information

• Minecraft client (and version): X
• Web browser (and version): Crome 97.0.4692.99
• Operating system (and version): Windows 11
• Minehut server name: X

Screenshots

Additional context

Not a major bug but should still have a useful/easy to read error msg

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Try to reproduce this bug and let us know in the comments if you can reproduce it or not. Make sure to include your relevant device information!