The game crashes when opening the "My Packs" tab

Please sure to reveal a Debug Screen and disable any packs

Please add a list of the resource packs that you use on the device.

Due to many numbers of resource packs causes a crash. it takes over 60+ packs & still an issue in current version

Seems to happen when one of the packs has incorrect JSON syntax in the manifest (might not be the only cause). You will have to copy it to the resource_packs folder manually because it will fail to import.

I Deleted All of my packs and it still crashes

Seems like it crashes only in globar resources, so you can still choose textures in world

I've attempted to fix this, thinking about Jervie's comment, by deleting massive amounts of resource packs, all old ones, ones that have the [!] symbol next to them. After all this, I opened the resource pack list in the global resource pack menu only to find.... that the crash now takes less time to happen after tapping to open the list. It was a big waste of time (but not space, at least!)
I'm starting to think this is a problem with Minecraft itself rather than any of the resource packs, as this only happened in the past 2 "stable" version updates.
I wonder if somehow manually creating a global resource definition file would be able to create a workaround for the crashing?
All of this is on Android, by the way.

Still an issue in 1.19.63 Hotfix

I found a solution for my experience with this bug. I had to go to  the following path:

...AppData\Local\Packages\Microsoft.MinecraftUWP_[ID String]\LocalState\games\com.mojang\resource_packs

and delete any folders with (1) in the folder name, and one folder representing a pack that wouldn't even show up in the list of options when I opened My Packs while in a realm. Once I relaunched a couple times suddenly I had access to My Packs again. Hope this helps! 

I'm assuming that one was causing the primary issue, and had a bad .JSON like @Mike Shultz proposed.

@klaus knechtel
where is this appdata path even at? I don't have a folder by that name anywhere on my device, unless you're talking about W10 edition's file path.

@ERROR2401, he is talking about W10 version, you can google minecraft folder on phone and go in resource_packs folder

hey! theres another issue i found.

So,  there were only 15/20 resource packs i last checked. and none of them had (1) in their name. so i deleted all of them. with show hidden files on, there was no folders or files left in the resource packs. but when i launched the game, there was 7 resource packs. while the game still running, i check the resource pack folder. nothing in there. so i go to the storage menu built into minecraft, to see only 3 resource packs and the one i imported i wanted to use. i removed all but the one i wanted to use. there was then 5 in there. upon opening, crashes the game. i launch and check storage again. nothing exept the mod i wanted to use. upon opening, still crashes the game. so i start looking around the files of the game. as to be expected, no information. got any idea whats happening?

@beihaiwjklgk
That might be the problem that's causing the crashes, since I counted 25 total packs in my resource packs list when in a world menu, but 26 in the same list in the global resource pack menu. Now I'm thinking the game thinks there's some amount of nonexistent, "ghost" resource pack(s), and when it tries to load them to show them in the list, there's nothing actually there, so the game crashes.

So if we connect these 2, incorrect json syntax causes game to think that there's another ghost pack, but since it doesn't have code (including icon, text etc.) game crashes

got the same question in 1.19.63, and still happens when deleting all the packs

I thought somehow deleting the valid known packs file would somehow fix it, but deleting it, editing it, doing whatever doesn't fix it. I did notice a pack_settings folder in the minecraftpe folder which was odd since pack settings in bedrock are configured either in the pack's files or through subpacks, but removing that did nothing either. I remember probably around the same time this bug started, that the gui was larger than it should be, requiring me to set the scale to -1 to have it at or close to the size it should be. also, sometimes when crashing from an unsuccessful attempt to fix this crash, the game says global resources reset, packs failed to load previously. I don't know if that's been noted already, though.

The Same Thing Is Happening To Me But Only The Game Crashes When I Try To Expand "My Packs"

Fixed in 1.19.80.22 Preview ✔

Tested the sample pack attached to this report in 1.19.80.22 preview and can confirm the crashing no longer occurs. It looks like now the broken packs appear at the bottom of your global resources list greyed out with some sort of corruption symbol and when you click on the broken pack it even tells you where the error is/what's missing in the manifest and why it's broken 

@exhila
I've tried to import the pack into the current non-beta version, and it doesn't import, but also doesn't crash, instead showing an error about the manifest.
However, expanding the resource packs list still crashes.