Please check the following previous discussions for its possible interest concerning to your query:

https://www.researchgate.net/post/Solubility_of_PLA https://www.researchgate.net/post/any_one_please_tell_suitable_solvent_for_PLA_polymers https://www.researchgate.net/post/Can_anyone_tell_me_why_my_solvent_casting_method_doesnt_work_any_more https://www.researchgate.net/post/How_to_avoid_porosity_when_solvent_casting_PLA_dissolved_with_Dichloromethane https://www.researchgate.net/post/Have_anyone_dissolved_PLA_with_1_4_dioxane_and_DMSO

chloroform dichloromethane for crystaline and for amorphous PLA you can consider acetone, THF, chlorofoem and dichloromethane.