Custom Potion do not work on the server side

Issue description

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I created a custom potion for my mod. In the singleplay world, it works fine, but I play on the server, when passing through the block and receiving this potion starts, it throws me out of the server with an error.

Here is my procedure for the block "When the player collides this block".
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Can you help?

Issue comments

Please attach your workspace and tell me which potion and block to check.

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I try to send more information, but the site does not give.

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Block.

procedure

custom potion

On potion active tick

I would have thrown off WorkSpace, but it weighs a lot. Since it contains 1000 elements

Upload it to mediafire then. But make sure to export it from File menu, not just zip it.

http://www.mediafire.com/file/8dhn16i2vobzg6d/MINERUSTADDONSMOD_BACKUP172.zip/file

It seems that get item in armor slot does not work on servers in 1.12.2. I will fix this bug in 2020.1.

thanks a lot

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