Spire.Doc NullPointerException on Linux

[interinfo]

I'm trying to generate a .docx file using Spire.Doc for Java run in Tomcat on an Ubuntu-based Azure VM. However, I'm encountering a NullPointerException when I try to create a new paragraph or paragraph style. in windows , i can to do anything with it.

[Environment]
Java: JDK8
OS: Ubuntu 22.04 on Azure VM
Spire.Doc version: Spire.Doc_13.5.3

[Problem]
The following simple code crashes:

[Code]
Document document = new Document();
ParagraphStyle titleStyle = new ParagraphStyle(document);<-- Crashes here

[Error]
java.lang.NullPointerException
at com.spire.doc.packages.sprjvw.spr┥▓(MemoryStream.java:424)
at com.spire.doc.packages.sprkuv.spr▥▋(Assembly.java:40)
at com.spire.doc.documents.Style$BuiltinStyleLoader.spr┉┛—(Unknown Source)
at com.spire.doc.documents.Style$BuiltinStyleLoader.spr〧┗—(Unknown Source)
at com.spire.doc.documents.Style.spr⌹┗—(Unknown Source)
at com.spire.doc.Document.spr┭‘—(Unknown Source)
at com.spire.doc.Document.spr╔‘—(Unknown Source)
at com.spire.doc.documents.Style.spr╓┚—(Unknown Source)
at com.spire.doc.documents.ParagraphStyle.<init>(Unknown Source)
at com.spire.doc.documents.ParagraphStyle.<init>(Unknown Source)

[Tommy.Tang]

Hello,

Thanks for your inquiry.
After preliminary testing, I was unable to reproduce your issue. Did you perform additional operations such as loading the document? To further investigate, please provide your test file along with the complete code. For privacy considerations, You can upload it to the attachment or send it to this email [email protected]. Thanks in advance.

Sincerely,
Tommy
E-iceblue support team