"An asset error occured during your last play session. Validating asset files to ensure stability, this may take a while."

Which it does take a while roughly 10 mins each time I load the game now.

I played within 15 hours and had the same issue then. This has been an ongoing issue since zendikar rising released last week.

You released a patch it helped for one day now we are back at this **** again. Time to fix the game legitimately and put the roll of duct tape back in the supply room.

2 days i can't play, I lost my daily quests :(

Yes this has happened to me and I have lost 6 matches where I was winning due to disconnect and taking 5-10 minutes to reload.

3 time this week, now during draft, pack 1, several minutes and still far from 100%

Same error. Disconnected during pack 3 of a draft and several games. Every time I start the client it takes long to load

Yep same error every time I start Arena.

Could semi live with it except for how it prevents you from rejoining games in time after mid-event crashes.

I have the same Problem. Having to wait 15 minutes avery day even if I just want to cycle my new quest is very annoying.
Video card driver are ok.

Nvidia driver update (Geforce Experience, not only driver as I think) solved the problem. Thanks a lot for the comments!

I have been experiencing this since the Launch. Same as everyone else. It takes a long time to load.

Same here, each time I start the game. No crashes, but always validating the assets, which is totally annoying because it takes a few minutes.

Yeah, that has been a problem since the last update. Everytime I start the game it pops up this "Asset error" message...

same here, lost a ranked limited game due to this bug :-(

Same here. Every. Single. Time. I boot up the game. I'm on PC. This happens whether or not I've had a crash or problem(rare). I always close the program with the menu exit function. This has been going on for probably a week. It takes 10+ minutes for the "asset check" or whatever to run and is really starting to **** me off. Are they even acknowledging and working on the issue??

Same for me, and almost a week after Zendikar launch. I uninstalled and reinstalled and still the same bug. I don't want to lose more gems so i'll stop playing for a while. Zendikar has been the worst launch for me.

I am on pc and spent a ton already on arena, and now i always have to deal with this asset error or reupdating my game.

Same here, but only reloading all assets every startup, not crashing during a game...

This is happening to me every time I log in as well.

I get this error validation every time, but the game does load afterwards.

same. Every single time i log off or close the client it tells me that at the restart of the client. it is very annoying and i tried closing the client 3 different ways (task manager, exit game, alt f4). Please fix this

same issue since zendikar update, every time i want to play the game i have to wait for that and sometimes when i play for some hours the game crashes