Can't evolve plants

Hi!
I've had this problem for a while now, I am unable to evolve plants when they are sparkling, there is no option to do so. All I can choose is to water, weed, harvest or harvest all. 
I have tried uninstalling the game and re-installing it, but the problem remains. 
Also, another slightly smaller problem with plants, I don't have any weeds, I can weed the plants when needed, but there is no visual aid to tell me it needs to be done. 
I have no idea when these problems started, but I definitely haven't always had them. 
Thank you in advance.

Try deleting The Sims 4 cache using steps below:
The Sims 4's game cache is located at Documents/Electronic Arts/The Sims 4/.
1. Delete the localthumbscache.package and cachewebkit file in this directory. This helps to "fix" some gameplay bugs.
2. Go inside the cache folder and delete all files that end in .cache, but do not delete the actual directory.
The .jpg files as well as the .dat that you find in the cache folder are safe to delete. These come from viewing households/lots from the gallery. If you play with the Online Access Feature turned off, or play offline, you may not have anything in this folder.
3. Go back, then to the cachestr folder. Delete all files here, but againdo not delete the actual directory.
* It's okay to delete the spotlight.package file.
4. In the lotcachedData folder, all contents may be deleted (but not the folder). These files are related to the gallery and can be safely deleted.
5. The onlinethumbnailcache folder is safe to delete IF it is present.
If you don't have some folders don't worry it's different for every user.

Okay, finally had some time to try what has been suggested, but sadly nothing changed. I still can't evolve my plants and no weeds show. I've also noticed another slight problem, that doesn't really annoy me that much, sometimes my sims flicker, they go lighter, darker, lighter, darker and so on. They don't always do it, just at some random moments, so it's not that big of a deal to me. I would like to be able to evolve my plants though.

I did try with a new save file. Made a new family and everything, but all my problems are still there.