You need an embassy visa for Bolivia if you have an Afghan passport
Visa options for Bolivia
Visitor visa
Travellers need a visa to visit Bolivia for Business or Tourism. A paper or embassy visa is the only visa available for travellers visiting Bolivia. The visa is typically a stamp or sticker added to the passport. Travellers must obtain this visa from a local embassy, consulate or visa center before travelling. Travellers must complete the visa application form on the Ministry of Foreign Affairs website. Once the application is verified online, the consulate will email the traveller with the appointment schedule.
This is not offered by sherpa°.
Apply on the government site.