Can't find online games and play daily challenges (can't connect to tachyon)

Hi, since about a week ago I can't find online lobbys. I think I can not connect online at all. The Ranked Multiplayer Button and the Daily Challenge Button are greyed out and when I hover over the Daily Challenge Button it says: 'You need to be logged into Tachyon to play the Daily Challenge'

I play on a 2010 Macbook Pro. Game is updated.

When I was looking through the files that are mentioned in the FAQ I noticed these things:

users\USER\library\application support\unity.mohawkgames.offworld This Folder is empty.

I didn't include crash logs because nothing is crashing.

Then I found this folder

/Users/USER/Library/Application Support/Stardock/Tachyon

And this is my Tachyon log

[2016-05-27T10:29:53] Info : Initialize (Version: 1.9.3.545) for (2618, Mohawk Games, Offworld Trading Company, 1.1.13174.0)
[2016-05-27T10:29:53] Info : Initialize (Version: 1.9.3.545) for (2338196353, ÿ, , )
[2016-05-27T10:29:53] Error : Missing configuration file:
[2016-05-27T10:29:53] Error : Tachyon is terminating due to an Error: Missing configuration file:
[2016-05-27T15:06:27] Info : Initialize (Version: 1.9.3.545) for (2618, Mohawk Games, Offworld Trading Company, 1.1.13174.0)
[2016-05-27T15:06:27] Info : Initialize (Version: 1.9.3.545) for (2338196353, ÿ, , )
[2016-05-27T15:06:27] Error : Missing configuration file:
[2016-05-27T15:06:27] Error : Tachyon is terminating due to an Error: Missing configuration file:

This goes on like this.
So I assume i need to fix my configuration file. But what configuration file is the log talking about and how can I fix this?

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I scrolled to the top in the log and found more. Afterwards the message is on repeat: Initialize>Error>Initialize>Error...

[2016-05-04T14:53:42] Info : Initialize (Version: 1.9.2.510) for (2618, Mohawk Games, Offworld Trading Company, 1.0.12745.0)
[2016-05-04T15:04:30] Error : HTTP Request failed.
Uri: '/v1/products/2618/storage?token=BHpHWlWPzDpi5iI%2BkRdw1SXs10ZSMGAkEHyJ7g%2BuSShtSaaMGwAuxtyfvYz4QZQiaHeQI0MGEja3fi10yj604gBzSpJdszaB4erzrN5NV7s/8f2u7h5abOExCJKEsWD/RAZnWLPwzX%2BnjPZ5mMsdvgxZrtY7bCtTytEb8OdkibBZw58cHru7nvZbTDwCtPe4TIrghdPy1YoqETuM6Mxz5yd72xz9N%2B2y7rvR2%2Bcr5UG0vM8lfJPJ0AJxi7lMCrJs&storageType=Replay&matchId=045FEDAE-431F-46A1-9EAA-C5797B459B2B'
StatusCode: '500'
Body: '{"name":"UNHANDLED_EXCEPTION","message":"Error writing MIME multipart body part to output stream.","statusCode":500}'
[2016-05-04T15:22:45] Error : HTTP Request failed.
Uri: '/v1/products/2618/storage?token=BHpHWlWPzDpi5iI%2BkRdw1SXs10ZSMGAkEHyJ7g%2BuSShtSaaMGwAuxtyfvYz4QZQiaHeQI0MGEja3fi10yj604gBzSpJdszaB4erzrN5NV7s/8f2u7h5abOExCJKEsWD/RAZnWLPwzX%2BnjPZ5mMsdvgxZrtY7bCtTytEb8OdkibBZw58cHru7nvZbTDwCtPe4TIrghdPy1YoqETuM6Mxz5yd72xz9N%2B2y7rvR2%2Bcr5UG0vM8lfJPJ0AJxi7lMCrJs&storageType=Replay&matchId=4B6540E2-38E7-47D0-91AD-E27BE51B4498'
StatusCode: '500'
Body: '{"name":"UNHANDLED_EXCEPTION","message":"Error writing MIME multipart body part to output stream.","statusCode":500}'
[2016-05-04T15:40:58] Error : HTTP Request failed.
Uri: '/v1/products/2618/storage?token=BHpHWlWPzDpi5iI%2BkRdw1SXs10ZSMGAkEHyJ7g%2BuSShtSaaMGwAuxtyfvYz4QZQiaHeQI0MGEja3fi10yj604gBzSpJdszaB4erzrN5NV7s/8f2u7h5abOExCJKEsWD/RAZnWLPwzX%2BnjPZ5mMsdvgxZrtY7bCtTytEb8OdkibBZw58cHru7nvZbTDwCtPe4TIrghdPy1YoqETuM6Mxz5yd72xz9N%2B2y7rvR2%2Bcr5UG0vM8lfJPJ0AJxi7lMCrJs&storageType=Replay&matchId=2DE1E6B6-1027-4F12-A64A-E22A0FD18D46'
StatusCode: '500'
Body: '{"name":"UNHANDLED_EXCEPTION","message":"Error writing MIME multipart body part to output stream.","statusCode":500}'
[2016-05-05T09:05:44] Info : Initialize (Version: 1.9.2.510) for (2618, Mohawk Games, Offworld Trading Company, 1.0.12745.0)
[2016-05-05T09:05:44] Info : Initialize (Version: 1.9.2.510) for (2485160833, ÿ, , )
[2016-05-05T09:05:44] Error : Missing configuration file:
[2016-05-05T09:05:44] Error : Tachyon is terminating due to an Error: Missing configuration file:

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Something is wrong with your installation as the required configuration file isn't present. To solve this perform a "Verify Integrity of Game Cache" in Steam. Instructions from Valve are here.

If that doesn't work please open a ticket with our support team here.

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Thank you for you help. Verifying Integrity of Game Cache fixed the problem.

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