Xcode 12.3 constantly crashes after update - xcode

Question

I wanted to update Xcode to 12.3, but there wasn't enough space for that on my MacBook, so I downloaded Xcode 12.3 from developer.apple.com, and unarchived the .xip file on an external SSD. After that, I moved Xcode back to the laptop, and now when I want to launch Xcode (so when I launch the app, not a particular project!) it crashes with the following log:
Process: Xcode [616]
Path: /Applications/Xcode.app/Contents/MacOS/Xcode
Identifier: com.apple.dt.Xcode
Version: 12.3 (17715)
Build Info: IDEFrameworks-17715000000000000~8 (12C33)
Code Type: X86-64 (Native)
Parent Process: ??? [1]
Responsible: Xcode [616]
User ID: 501
Date/Time: 2020-12-18 14:22:40.576 +0200
OS Version: macOS 11.1 (20C69)
Report Version: 12
Bridge OS Version: 5.1 (18P3030)
Anonymous UUID: A6A1D2D4-69BA-5197-5F6F-C0FB4D60ADEB
Time Awake Since Boot: 91 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: 12C33
ASSERTION FAILURE in /Library/Caches/com.apple.xbs/Sources/DVTFrameworks/DVTFrameworks-17718/DVTFoundation/DeveloperStructure/DVTExtendedPlatformInfo.m:110
Details: (extensionPoint) should not be nil.
Object: <DVTExtendedPlatformInfo>
Method: +extendedPlatformInfoForPlatformIdentifier:error:
Thread: <NSThread: 0x7faa6100a380>{number = 1, name = main}
Open FDs: 6/256
Hints:
Backtrace:
0 -[IDEAssertionHandler handleFailureInMethod:object:fileName:lineNumber:assertionSignature:messageFormat:arguments:] (in IDEKit)
1 _DVTAssertionHandler (in DVTFoundation)
2 _DVTAssertionFailureHandler (in DVTFoundation)
3 __75+[DVTExtendedPlatformInfo extendedPlatformInfoForPlatformIdentifier:error:]_block_invoke (in DVTFoundation)
4 _dispatch_client_callout (in libdispatch.dylib)
5 _dispatch_once_callout (in libdispatch.dylib)
6 +[DVTExtendedPlatformInfo extendedPlatformInfoForPlatformIdentifier:error:] (in DVTFoundation)
7 -[DVTPlatform(DVTExtendedPlatformInfo) dvt_extendedInfoOrError:] (in DVTFoundation)
8 +[DVTPlatform validatePlatformDataReturningError:] (in DVTFoundation)
9 IDEInitialize (in IDEFoundation)
10 -[IDEApplicationController applicationWillFinishLaunching:] (in IDEKit)
11 __CFNOTIFICATIONCENTER_IS_CALLING_OUT_TO_AN_OBSERVER__ (in CoreFoundation)
12 ___CFXRegistrationPost_block_invoke (in CoreFoundation)
13 _CFXRegistrationPost (in CoreFoundation)
14 _CFXNotificationPost (in CoreFoundation)
15 -[NSNotificationCenter postNotificationName:object:userInfo:] (in Foundation)
16 -[NSNotificationCenter(DVTNSNotificationCenterAdditions_MRR) _dvt_postNotificationName:object:userInfo:] (in DVTFoundation)
17 -[NSApplication finishLaunching] (in AppKit)
18 -[DVTApplication finishLaunching] (in DVTKit)
19 -[NSApplication run] (in AppKit)
20 NSApplicationMain (in AppKit)
21 start (in libdyld.dylib)
abort() called
Application Specific Signatures:
((extensionPoint)) != nil
I've tried everything I could find online:
restart Mac (in safe mode)
update macOS to Big Sur 11.1
reinstall Xcode Command Line Tools
clear derived data
clear all Xcode associated files (excepting the app itself) using AppCleaner
Do you have any idea on how I can fix this?
By the way, isn't it strange that the file that gives ASSERTION FAILURE doesn't even exist on my computer?

Answer 1

I somehow managed to free up around 40 GB on my MacBook, so I was able to download Xcode from App Store. And it seems like this was a "cleaner" install, stopping Xcode from crashing.