Multiworld plugin crash issue

[Sarthak5276]

Describe the bug
A clear and concise description of what the bug is.

To Reproduce
Steps to reproduce the behavior:

1. Go to '...'
2. Click on '....'
3. Scroll down to '....'
4. See error

Expected behavior
I mined sand and the server crashed and whenever I try to join it crashes and in console it says it happens because of multiworld type error

Screenshots
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System information (please complete the following information):

• OS: android
• PHP Version: 5.16.0
• MultiWorld Version: [e.g. dev#142, Release 1.7.0-beta2