I'm testing this docker solution but I'm getting this message when I click send button:
(ERROR) Traceback (most recent call last):
File "/usr/lib/armory/ArmoryQt.py", line 3451, in clickSendBitcoins
DlgSendBitcoins(self.getSelectedWallet(), self, self).exec_()
File "/usr/lib/armory/qtdialogs.py", line 4594, in __init__
spendFromLockboxID=spendFromLockboxID)
File "/usr/lib/armory/ui/TxFrames.py", line 151, in __init__
RBFcallback=RBFcallback)
File "/usr/lib/armory/ui/WalletFrames.py", line 232, in __init__
self.updateOnWalletChange()
File "/usr/lib/armory/ui/WalletFrames.py", line 347, in updateOnWalletChange
self.selectWltCallback(wlt)
File "/usr/lib/armory/ui/TxFrames.py", line 347, in setWallet
self.setupCoinSelectionInstance()
File "/usr/lib/armory/ui/TxFrames.py", line 396, in setupCoinSelectionInstance
self.coinSelection = self.wlt.cppWallet.getCoinSelectionInstance()
File "/usr/lib/armory/CppBlockUtils.py", line 2164, in getCoinSelectionInstance
def getCoinSelectionInstance(self): return _CppBlockUtils.WalletContainer_getCoinSelectionInstance(self)
DbErrorMsg: <CppBlockUtils.DbErrorMsg; proxy of <Swig Object of type 'DbErrorMsg *' at 0x7f7e4dc0c480> >
Traceback (most recent call last):
File "/usr/lib/armory/ArmoryQt.py", line 3451, in clickSendBitcoins
DlgSendBitcoins(self.getSelectedWallet(), self, self).exec_()
File "/usr/lib/armory/qtdialogs.py", line 4594, in __init__
spendFromLockboxID=spendFromLockboxID)
File "/usr/lib/armory/ui/TxFrames.py", line 151, in __init__
RBFcallback=RBFcallback)
File "/usr/lib/armory/ui/WalletFrames.py", line 232, in __init__
self.updateOnWalletChange()
File "/usr/lib/armory/ui/WalletFrames.py", line 347, in updateOnWalletChange
self.selectWltCallback(wlt)
File "/usr/lib/armory/ui/TxFrames.py", line 347, in setWallet
self.setupCoinSelectionInstance()
File "/usr/lib/armory/ui/TxFrames.py", line 396, in setupCoinSelectionInstance
self.coinSelection = self.wlt.cppWallet.getCoinSelectionInstance()
File "/usr/lib/armory/CppBlockUtils.py", line 2164, in getCoinSelectionInstance
def getCoinSelectionInstance(self): return _CppBlockUtils.WalletContainer_getCoinSelectionInstance(self)
<class 'CppBlockUtils.DbErrorMsg'>: <CppBlockUtils.DbErrorMsg; proxy of <Swig Object of type 'DbErrorMsg *' at 0x7f7e4dc0c480> >
No new window opens, gui does nothing

I followed this thread but I made some changes in Dockerfile:
FROM linuxmintd/mint19.3-amd64
RUN apt update
RUN apt -y install python-qt4 python-psutil
RUN wget https://github.com/goatpig/BitcoinArmory/releases/download/v0.96.5/armory_0.96.5_amd64_gcc4.9_noasm.deb
RUN dpkg -i armory_0.96.5_amd64_gcc4.9_noasm.deb
CMD /usr/bin/python /usr/lib/armory/ArmoryQt.py --armorydb-port="5000" --force-fcgi
Did I miss anything?