If you have unity crashes when connecting to any server, the reason may be older CPU's - a copy of our statement on that in Discord:
PSA: For the unity crashes seen on joining a world the problem is the usage of very old CPU's that do not support the AVX2 / SSE4 instructions that are required in the new Unity version we use. Those CPU's are all below our minimum requirements, but we will do our best to find a way to enable you to play nontheless. We are reaching out to players affected to test a variety of options we have via custom builds. We'll let you know if we can find a solution that works for everyone.
If that is not the case for you, please reach out to [email protected].