Based on the above legal provisions, you should check the relevant registration procedures of the house first. If the mortgage does exist before you sign the lease, then the law presumes that you should have done your duty of reasonable care before you sign the lease, that is, the mortgage of the house is legally effective to you. Therefore, if the mortgagee has the right to ask you to move out of the house within a reasonable period of time after the enterprise goes bankrupt and obtains the ownership of the house in the priority order of security interests, the legal provisions of buying and selling without breaking the lease are not applicable at this time.
Of course, the bankrupt enterprise that signed the lease contract with you is not exempt from its responsibility, and because it maliciously concealed the relevant mortgage facts, it should bear the corresponding liability for damages in addition to the liability for breach of contract.
Your suggestion is to get in touch with the unit or individual with mortgage as soon as possible to discuss whether the lease can be renewed or not to perform the original contract. If negotiation fails, it is necessary for you to claim relevant compensation from the bankrupt enterprise immediately. But at this time, you can only be an ordinary creditor and get corresponding compensation according to the total remaining assets of the enterprise and other creditors in proportion. According to the current situation in China, the actual economic compensation can not be too optimistic, and it is very good to compensate for the loss of about 20%.
As for the notary office, they are only responsible for the formal audit and are not responsible for any compensation for your contract problems. Unless it is clear in the corresponding agreement or contract terms that there is no right defect when renting the house, and the notary office has made corresponding commitments.