In pa an employer has no general obligation to provide employmnent of any duration, it is an at will state. A contract can sometimes modify that rule of thimb but the language of the contract would need to be carefully read ro see if it qualifies. In the event that there is indeed a breach, the contract may also provide they only means of redress, sometimes it is an arbitration provision. Have an attorney review the contract
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Your remedy would depend on your contract, but it would seem without reading it (and it would be necessary to read it to give you legal advice) that you could sue for contractual breach and get lost wages.