0.96.1 has same problem, different error:

(ERROR) TxFrames.py:834 - Problem sending transaction!
Traceback (most recent call last):
  File "/usr/lib/armory/ui/TxFrames.py", line 828, in createTxAndBroadcast
    ustxSigned = self.wlt.signUnsignedTx(ustx)
  File "/usr/lib/armory/armoryengine/PyBtcWallet.py", line 2682, in signUnsignedTx
    ustx.createAndInsertSignatureForInput(idx, addrObj.binPrivKey32_Plain)
  File "/usr/lib/armory/armoryengine/Transaction.py", line 2646, in createAndInsertSignatureForInput
    ustxi.createAndInsertSignature(self.pytxObj, sbdPrivKey, hashcode, DetSign)
  File "/usr/lib/armory/armoryengine/Transaction.py", line 1398, in createAndInsertSignature
    derSig = self.createTxSignature(pytx, sbdPrivKey, hashcode, DetSign)
  File "/usr/lib/armory/armoryengine/Transaction.py", line 1355, in createTxSignature
    raise SignatureError('No PubKey that matches this privKey')
SignatureError: No PubKey that matches this privKey
(ERROR) Traceback (most recent call last):
  File "/usr/lib/armory/ui/TxFrames.py", line 828, in createTxAndBroadcast
    ustxSigned = self.wlt.signUnsignedTx(ustx)
  File "/usr/lib/armory/armoryengine/PyBtcWallet.py", line 2682, in signUnsignedTx
    ustx.createAndInsertSignatureForInput(idx, addrObj.binPrivKey32_Plain)
  File "/usr/lib/armory/armoryengine/Transaction.py", line 2646, in createAndInsertSignatureForInput
    ustxi.createAndInsertSignature(self.pytxObj, sbdPrivKey, hashcode, DetSign)
  File "/usr/lib/armory/armoryengine/Transaction.py", line 1398, in createAndInsertSignature
    derSig = self.createTxSignature(pytx, sbdPrivKey, hashcode, DetSign)
  File "/usr/lib/armory/armoryengine/Transaction.py", line 1355, in createTxSignature
    raise SignatureError('No PubKey that matches this privKey')
SignatureError: No PubKey that matches this privKey

Traceback (most recent call last):
  File "/usr/lib/armory/ui/TxFrames.py", line 828, in createTxAndBroadcast
    ustxSigned = self.wlt.signUnsignedTx(ustx)
  File "/usr/lib/armory/armoryengine/PyBtcWallet.py", line 2682, in signUnsignedTx
    ustx.createAndInsertSignatureForInput(idx, addrObj.binPrivKey32_Plain)
  File "/usr/lib/armory/armoryengine/Transaction.py", line 2646, in createAndInsertSignatureForInput
    ustxi.createAndInsertSignature(self.pytxObj, sbdPrivKey, hashcode, DetSign)
  File "/usr/lib/armory/armoryengine/Transaction.py", line 1398, in createAndInsertSignature
    derSig = self.createTxSignature(pytx, sbdPrivKey, hashcode, DetSign)
  File "/usr/lib/armory/armoryengine/Transaction.py", line 1355, in createTxSignature
    raise SignatureError('No PubKey that matches this privKey')
armoryengine.ArmoryUtils.SignatureError: No PubKey that matches this privKey