It looks like Bittrex has released an update explaining the situation.
Why is Bittrex Global suspending service in the Ukraine, Belarus, Burundi, Mali, Myanmar, Nicaragua and Panama?Bittrex Global prides itself on being not only the safest and securest place to trade cryptocurrency but also the most strictly regulated. With that in mind, due to the current regulatory environment in certain jurisdictions, we were instructed by our Legal and Compliance teams that in the short-term, we would need to suspend service from a few countries, these include: Ukraine, Belarus, Burundi, Mali, Myanmar, Nicaragua and Panama.
What do I need to do if I am from one of the affected countries?Please login to Bittrex Global and withdraw all of your funds before September 24th, 2020. For additional help please see our support article here.
If you have two-factor enabled, you will need to enter your 6 digit code. If you do not have two-factor enabled, you will need to login to your email account and click the verification link sent to you.
Please note if your balance is below the minimum withdrawal amount for the wallet, you will not be able to withdraw it. The minimum withdrawal for all coins must be greater than 3 times the fee. For example, your balance in BTC must be .00150001 or greater as the fee is .0005.
When is the last day I will be able to access the funds in my account?Your account will be active until September 24, 2020, 23:59 UTC, after this time, service will be suspended.
What happens if I do not access my funds by September 24th, 2020?We highly recommend that you withdraw your funds immediately. If funds remain in your account after September 24, 2020, 23:59 UTC, we cannot guarantee their withdrawal. In the event that you have not withdrawn funds from your account before the deadline, you may still be able to withdraw your funds, but will not be able to trade with the balance in your account. If any issues arise, please do not hesitate to contact our Customer Service team.
There haven’t been any recent changes to the regulatory policies in my country, why is this happening now? Bittrex Global’s Compliance and Legal teams monitor the regulatory landscape in all countries it operates in, as well as the interaction of rules and regulations in all these jurisdictions. Although it is not an easy decision, at this time, our team believes that suspending services in the affected countries is the best course of action.
https://bittrexglobal.zendesk.com/hc/en-us/articles/360016422699-Important-Account-Information-for-Bittrex-Global-Users-in-Ukraine-Belarus-Burundi-Mali-Myanmar-Nicaragua-and-Panama