Created attachment 120335 [details]
test file

SUMMARY

Hi, 
I manage accounts and categories with 2 currencies, it was working well until recently. (until 5.0.3 ?)
After I import entries to an account, I edit their categories, and sometime I use a category in another currency. When doing so, KMyMoney asks for the value in the other currency, or the rate to convert. 
I usually always get a proposal and just accept it.

But now , I do not get any rate anymore and cannot even enter one properly, I cannot type a decimal separator for instance.
So at the moment I cannot pick any category with a different currency.

I started to learn managing shares recently and refreshing values from internet, I though I had broken something, but I can easily reproduce my issue starting from a fresh new file.



 
STEPS TO REPRODUCE
1. Create a new file, € as main currency, add a currency, DKK for instance, create a bank account in DKK, update currencies from internet
2. Create 2 categories, one in euro, one in DKK
3. Create and assign an entry to a DKK category > OK
4. Create and assign an entry to a € category


OBSERVED RESULT
    > the screen to validate the cost in other curreny or the rate is displayed
    > but no value
    > and impossible to type a value with decimals

EXPECTED RESULT
    Usually I get a value based on the latest rate, which is what I need in 99% of the time
    It would actually be nice that this is done automatically without accpeting everytime, and only when needed use a target value in the other currency.


SOFTWARE/OS VERSIONS
Windows: 
macOS: 
Linux/KDE Plasma: OpenSUSE Tumbleweed 
(available in About System)
KDE Frameworks 5.57.0
Qt 5.12.3 (construit sur 5.12.3)
Le système de fenêtres xcb

Attachment:
-Kmymoney file example
-file with screenshots