Problems with Xcode

Hello, I'm using Mac(MacBook Pro (13-inch, M1, 2020), Version 11.2.3) for two days and having problems with Xcode(Version 12.4 (12D4e)). The first problem I've encountered is exactly same problem with this: https://stackoverflow.com/questions/66060471/hung-on-checking-out-when-trying-to-clone-git-repository-to-xcode

After a while Xcode started crashing repeatedly.

The error logs look like this:

Code Block 
Process:               Xcode [1788]
Path:                  /Applications/Xcode.app/Contents/MacOS/Xcode
Identifier:            com.apple.dt.Xcode
Version:               12.4 (17801)
Build Info:            IDEFrameworks-17801000000000000~7 (12D4e)
App Item ID:           497799835
App External ID:       839994694
Code Type:             ARM-64 (Native)
Parent Process:        ??? [1]
Responsible:           Xcode [1788]
User ID:               501
Date/Time:             2021-03-27 14:22:13.319 +0300
OS Version:            macOS 11.2.3 (20D91)
Report Version:        12
Anonymous UUID:        058FB042-CDB0-046E-5356-B1091752AEC7
Time Awake Since Boot: 1300 seconds
System Integrity Protection: enabled
Crashed Thread:        0  Dispatch queue: com.apple.main-thread
Exception Type:        EXC_CRASH (SIGABRT)
Exception Codes:       0x0000000000000000, 0x0000000000000000
Exception Note:        EXC_CORPSE_NOTIFY
Application Specific Information:
ProductBuildVersion: 12D4e
ASSERTION FAILURE in /Library/Caches/com.apple.xbs/Sources/IDEFrameworks/IDEFrameworks-17801/IDEKit/Workspace/IDEWorkspaceDocument.m:3270
Details:  (tabController) should not be nil.
Object:   <IDEWorkspaceDocument: 0x1343991e0>
Method:   -commitStateToDictionary:
Thread:   <NSThread: 0x136f1d110>{number = 1, name = main}
Open FDs: 38/7168
Hints:   
 
Backtrace:
  0   -[IDEAssertionHandler handleFailureInMethod:object:fileName:lineNumber:assertionSignature:messageFormat:arguments:] (in IDEKit)
  1   _DVTAssertionHandler (in DVTFoundation)
  2   _DVTAssertionFailureHandler (in DVTFoundation)
  3   -[IDEWorkspaceDocument showWindows] (in IDEKit)
  4   -[DVTStateToken _copyStatefulObjectState] (in DVTFoundation)
  5   -[DVTStateToken pushStateToRepositoryAndReturnError:] (in DVTFoundation)
  6   -[DVTStateRepository _updateStateIfNeeded] (in DVTFoundation)
  7   -[DVTStateRepository collectStateFromRegisteredObjects] (in DVTFoundation)
  8   -[IDEWorkspaceDocument writeStateData] (in IDEKit)
  9   __28-[IDEWorkspaceDocument init]_block_invoke (in IDEKit)
 10   -[DVTDelayedInvocation runBlock:] (in DVTFoundation)
 11   __NSFireDelayedPerform (in Foundation)
 12   __CFRUNLOOP_IS_CALLING_OUT_TO_A_TIMER_CALLBACK_FUNCTION__ (in CoreFoundation)
 13   __CFRunLoopDoTimer (in CoreFoundation)
 14   __CFRunLoopDoTimers (in CoreFoundation)
 15   __CFRunLoopRun (in CoreFoundation)
 16   CFRunLoopRunSpecific (in CoreFoundation)
 17   RunCurrentEventLoopInMode (in HIToolbox)
 18   ReceiveNextEventCommon (in HIToolbox)
 19   _BlockUntilNextEventMatchingListInModeWithFilter (in HIToolbox)
 20   _DPSNextEvent (in AppKit)
 21   -[NSApplication(NSEvent) _nextEventMatchingEventMask:untilDate:inMode:dequeue:] (in AppKit)
 22   -[DVTApplication nextEventMatchingMask:untilDate:inMode:dequeue:] (in DVTKit)
 23   -[NSApplication run] (in AppKit)
 24   NSApplicationMain (in AppKit)
 25   start (in libdyld.dylib)
 
abort() called
Application Specific Signatures:
((tabController)) != nil

What would cause this? I haven't tried reinstalling Xcode yet. Should I do that?